X,Y = map(int,input().split())
ab = []
for i in range(int((10**7)**(1/2))+1):
    ab.append(i**2)
v = [0]*(10**7+1)
for i in range(1,len(ab)-1):
    for j in range(i+1,len(ab)):
        if ab[i]+ab[j] > 10000000:
            continue
        else:
            v[ab[i]+ab[j]] += 2

for i in range(1,len(ab)):
    if ab[i]+ab[i] > 10000000:
        continue
    v[ab[i]+ab[i]] += 1
    v[ab[i]] += 1
ans = 0
for i in range(X,Y+1):
    if ans < v[i]:
        ans = v[i]
print(ans*4)